On Wednesday 15 August 2007 05:05:51 pm you wrote:
> Darren Dale wrote:
> > I'm doing something along the lines of:
> >
> > create an initial image with imshow
> > add a colorbar
> > update the image using the image's set_data method
> >
> > Occassionally, the extents of the image will change. How do I handle
> > that? The only place I can find to set the extents is in the call to
> > imshow. The resulting image has a get_extents, but not a setter. I can't
> > make repeated calls to imshow, because the new image isnt coupled to the
> > colorbar. I can't figure out how to couple the colorbar to the new image,
> > and I dont know how to get rid of the old colorbar to clear space for a
> > new one.
>
> Darren,
>
> Try directly setting the extent via the _extent attribute of the image
> object. If that works and doesn't cause any new problems, then we can
> add a trivial set_extent method.
I just committed this patch in svn. The additional code was lifted from
imshow, to reshape the axes along with the image.
Darren
Index: lib/matplotlib/image.py
===================================================================
--- lib/matplotlib/image.py (revision 3709)
+++ lib/matplotlib/image.py (working copy)
@@ -236,6 +236,18 @@
# by mistake.
self.set_data(A)
+
+ def set_extent(self, extent):
+ """extent is data axes (left, right, bottom, top) for making image
plots
+ """
+ self._extent = extent
+
+ xmin, xmax, ymin, ymax = extent
+ corners = (xmin, ymin), (xmax, ymax)
+ self.axes.update_datalim(corners)
+ if self.axes._autoscaleon:
+ self.axes.set_xlim((xmin, xmax))
+ self.axes.set_ylim((ymin, ymax))
def get_interpolation(self):
"""
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